. >> as sandy moved north, it merged with a winter storm, creating a superstorm, double the size of a normal hurricane. >> the one part storm that was already on land was combining with the hurricane that was offshore. as they combined, it was almost one plus one equals two and a half. >> many in sandy's path evacuated. nick camerada did not. >> at about 6:00, the tide should be way out. i walked down the block, and i started seeing water coming on to cedar grove, and i started yelling and banging on doors for everybody to get out of their houses, because this is going to be a storm of disastrous magnitude. >> i was, as a scientist, fascinated, but as a citizen of this city, as time went on, i started to feel more and more actual fear. >> in new york, as the eye of the storm approached, wind gusts reached 75 miles per hour, and the flood waters outside nick camerada's house were rising, fast. >> try to move the car up the street a little bit, i almost didn't get back to the house. and i couldn't open the door because there was 3 or 4 feet of water outside the door. when i grabbed the